Revit exporting DWG model wrong translation

[Anonymous]

A customer sent me a Revit model and Recap point cloud. In order to view aligned model and scan, I open Revit model in Revit 2016, and reload point cloud by doing the following:

Insert / Manage Links / Point Clouds / Reload From...

Then I reload the RCP Link Name, providing the correctly aligned model/scan.

My next task is to export a DWG from Revit, and load the DWG model and Recap point cloud in AutoCAD. I set DWG Export Setup options to the following:

Units - Feet, Solids - ACIS solids, Coordinate system basis - Shared (Note. Shared Site is at N/S - 2160108.268, E/W - 6114386.503, Elevation - 0 [Feet], Angle to True North - 349.05)

Upon exporting DWG, I receive warning message stating, "The view boundaries for the identified views are too large to export.
Use a crop region to reduce the boundaries of the view." This is just a warning message, and Revit creates a DWG.

The problem I discover is that Revit is exporting a DWG that is slightly off in translation, in comparison to the original scan, by about 20 feet in the x and y axis. The elevation and rotation are correct.

Any thoughts on how to export the correct DWG model?

Thanks!

Orso

[Anonymous]

One of those items do not have the coordinate system set up correctly. The scanned item would probably need to have the coordinates published to it before it would be able to be inserted via shared coordinates. In these instances I will typically maintain a Project Standards Revit file that acts as a repository for the coordinate system. Then I link in the models for the project and publish the coordinates to them so that each file can be inserted via shared coordinates. Other things that could throw off the size is that the DWG info doesn't necessarily obey the crop region if its exported after import. I know this is true if X-Clip is utilized in the original DWG file. Long story short, it sounds like there is a process error in how the coordinates were published to each of your files, so I would go back on that and see if you can get it to work correctly. Hope that helps.